Question

show that diagonals of a square are equal and bisect each other at right angles.​

Answer 1

Answer:

∴AC and BD bisect each other at right angles.

Step-by-step explanation:

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Answer 2

Answer:

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Match the metal (Column I) with its reaction with oxygen (Column II): Column I Column II A. Potassium (i) Does not react event at high temperatures B. Zinc (ii) Gets coated with black-coloured layer of oxide C. Copper (ii) ii) Does not burn at ordinary temperature D. Silver (iv) Burns vigorously (a) A-(iv), B-(iii), C-ü), D-(i) (b) A-(iv), B-(ii), C-(i), D-(iii) b (c) A-(iii), B-(ii), C-(i), D-(iv) (dA-(iv), B-(ii), C-(ii), D-(i) : con